US20130039795A1 - Shaft rotating double-stator multi-speed motor with curves of constant width - Google Patents
Shaft rotating double-stator multi-speed motor with curves of constant width Download PDFInfo
- Publication number
- US20130039795A1 US20130039795A1 US13/381,086 US201113381086A US2013039795A1 US 20130039795 A1 US20130039795 A1 US 20130039795A1 US 201113381086 A US201113381086 A US 201113381086A US 2013039795 A1 US2013039795 A1 US 2013039795A1
- Authority
- US
- United States
- Prior art keywords
- stator
- curves
- rotor
- speed motor
- constant width
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C1/00—Rotary-piston machines or engines
- F01C1/30—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F01C1/34—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members
- F01C1/344—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
- F01C1/3446—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along more than one line or surface
- F01C1/3447—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along more than one line or surface the vanes having the form of rollers, slippers or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C11/00—Combinations of two or more machines or engines, each being of rotary-piston or oscillating-piston type
- F01C11/002—Combinations of two or more machines or engines, each being of rotary-piston or oscillating-piston type of similar working principle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
- F01C21/02—Arrangements of bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
- F01C21/10—Outer members for co-operation with rotary pistons; Casings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
- F01C21/10—Outer members for co-operation with rotary pistons; Casings
- F01C21/104—Stators; Members defining the outer boundaries of the working chamber
- F01C21/108—Stators; Members defining the outer boundaries of the working chamber with an axial surface, e.g. side plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C19/00—Sealing arrangements in rotary-piston machines or engines
- F01C19/08—Axially-movable sealings for working fluids
- F01C19/085—Elements specially adapted for sealing of the lateral faces of intermeshing-engagement type machines or engines, e.g. gear machines or engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/50—Bearings
- F04C2240/52—Bearings for assemblies with supports on both sides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/80—Other components
- F04C2240/801—Wear plates
Definitions
- the present invention relates to a variable capacity hydraulic machine, and particularly, to a shaft rotating double-stator multi-speed motor with curves of constant width.
- the hydraulic motor As an increasingly mature hydraulic component, the hydraulic motor is widely applied in different industries. In various motors, most major parts are in a sliding friction state, which not only affects their service lives but also decreases their working efficiencies. In addition, most motors cannot work unless being reset by a return spring, while a fatigue failure of the spring is caused during the reciprocating motion, thus the service life and the reliability of the motor are directly affected. Furthermore, the motors are mainly single input and single output motors, and several motors shall be connected in parallel to achieve multiple speeds. But it is difficult to accommodate several motors in one motor shell simultaneously, so it is hard to realize a large-scale speed change or torque conversion, and also hard to achieve high power, small size or light weight.
- the inventor disclosed a double-stator roller pump with curves of constant width (Chinese Patent No. 02144406.4) in 2002, in which a curve of a external surface curve of the inner stator and a curve of a internal surface curve of the outer stator are two similar curves which are smooth and closed.
- the difference between the curvature radiuses of the outer stator curve and the inner stator curve is a constant.
- the rotor is a circular ring, which has radial through-grooves for mounting sets of rollers, each set composed of an outer roller body, a link and an inner roller body.
- the pump has a novel design and works stably, and can serve as either a pump or a motor.
- oil distributing ports of such pump are always provided on a side plate, thus components, such as the sets of rollers, will be worn severely, thereby causing problems such as oil leakage and low efficiency.
- the present invention provides a shaft rotating double-stator multi-speed motor with curves of constant width, which works stably, achieves a high efficiency and can realize a multi-speed output in one motor.
- a shaft rotating double-stator multi-speed motor with curves of constant width comprising a rotor, an inner stator mounted in the rotor, an outer stator, sets of sliders mounted on the rotor, a left end cover and a right end cover.
- a positioning key is disposed between the inner stator and the right end cover to prevent a relative rotation therebetween; a left washer is mounted at the bottom of sectorial cylinders of the rotor, and a right washer is mounted at the tail of the sectorial cylinders of the rotor; the rotor is mounted in a cavity of the outer stator by means of a left bearing and a right bearing; the left end cover and the right end cover are mounted on two end faces of the outer stator by fastening bolts.
- a distance between adjacent edges of two adjacent oil distributing ports in outer stator is larger than or equal to the minimum distance between two tangent lines formed by contacting two adjacent sets of sliders with the internal surface of the outer stator, and the oil distributing ports in outer stator are connected to a hydraulic power unit through oil passing holes in outer stator and a pipeline.
- a distance between adjacent edges of two adjacent oil distributing ports in inner stator is larger than or equal to the minimum distance between two tangent lines formed by contacting two sets of sliders mounted in the sectorial cylinders of the rotor with the external surface of the front portion of the inner stator, and the oil distributing ports in inner stator are connected to a hydraulic power unit through communicated oil passing holes in inner stator and a pipeline.
- An external surface of a rear portion of the inner stator is a cylindrical surface, on which a keyway is machined, a screw thread is machined at the tail of the inner stator, and the inner stator is fixed on the right end cover by a round nut.
- An oil leakage hole is machined a center of the rotor center and connected to a leakage oil return port of the rotor.
- the left washer is circular, with sectorial holes opened on the circumference for fitting the sectorial cylinders and a central hole opened at the circle center; and the right washer is also circular, with sectorial holes opened on the circumference for fitting the sectorial cylinders, and an inner stator mounting hole opened at the circle center for fitting the cylindrical surface of the inner stator.
- the set of sliders may have multiple structures, such as cylinder type, bicylinder type, bicylinder with link type, slider type, or blade type cut from concentric circles.
- the width of the set of sliders shall meet the width requirement of a groove formed by two adjacent sectorial cylinders of the rotor, and the height of the set of sliders is equal to a required height of the sectorial cylinders of the rotor.
- the radius of the link end shall be larger than the diameter of the cylinder.
- the set of sliders of slider type shall be obtained by removing portions on both sides of cylinders adopting a distance between the inner and outer curves of the double-stator motor as their diameters.
- the present invention has the following beneficial effects: since the oil distributing ports are opened on the internal surface of the elliptical curve of the outer stator and the external surface of the elliptical curve of the front portion of the inner stator, the present invention decreases the wearing of the inner stator, the outer stator and the set of sliders, reduces the leakage, and makes the wearing gap be automatically compensated.
- the motor according to the present invention works stably and has a small volume, a light weight, a large specific power, a strong operability, a long service life and a high efficiency.
- a plurality of hydraulic motors of different inputs are set in one shell, so as to output different speeds and torques when these motors have different inputs or outputs.
- the present invention can also serve as a multi-output pump.
- FIG. 1 is a view showing a structure of a shaft rotating double-stator multi-speed motor with curves of constant width;
- FIG. 2 is a sectional view of the shaft rotating double-stator multi-speed motor with curves of constant width, which mainly illustrates fitting relationships among an outer stator, a rotor, an inner stator and sets of sliders;
- FIG. 3 is a view showing a structure of the rotor
- FIG. 4 is a view showing the structure of the rotor in direction K
- FIG. 5 is a right view of the rotor
- FIG. 6 is view showing a structure of a left washer
- FIG. 7 is view showing a structure of a right washer
- FIG. 8 is view showing a structure of the inner stator
- FIG. 9 is a sectional view of the inner stator taken in a line D-D in FIG. 8 ;
- FIG. 10 is a sectional view of the inner stator taken in a line B-B in FIG. 8 ;
- FIG. 11 is a sectional view of the inner stator taken in a line C-C in FIG. 8 ;
- FIG. 12 is a view showing a structure of a half shaft rotating double-stator multi-speed motor with curves of constant width according to another embodiment of the present invention.
- FIG. 13 is a sectional view corresponding to FIG. 12 taken in another direction.
- the present invention provides a shaft rotating double-stator multi-speed motor with curves of constant width, comprising a rotor, an inner stator mounted in the rotor, an outer stator, sets of sliders mounted on the rotor, a left end cover and a right end cover.
- a curve of an external surface of a front portion of the inner stator and a curve of an internal surface of the outer stator are two similar curves which are smooth and closed.
- Oil distributing ports are opened in the external surface of the front portion of the inner stator in the same number of the oil distributing ports in the outer stator. Since theses oil distributing ports are opened in an internal surface of the outer stator curve and an external surface of the inner stator front portion curve, the present invention decreases the wearing of the inner stator, the outer stator and the set of sliders, reduces the leakage, and enables the wearing gap be automatically compensated.
- FIG. 1 is an overall view showing a structure of the disclosed shaft rotating double-stator multi-speed motor with curves of constant width according to example 1.
- the motor comprises a rotor 5 , an inner stator 19 , an outer stator 3 , sets of sliders 22 , a left end cover 6 and a right end cover 1 .
- a curve of an external surface of a front portion of the inner stator 19 and a curve of an internal surface curve of the outer stator 3 are two similar elliptic curves which are smooth and closed.
- the rotor 5 is mounted with sets of sliders, each set composed of an inner roller 2 , a link 4 and an outer roller 12 .
- Four oil distributing ports 20 are opened in the elliptic internal surface of the outer stator 3 .
- Four oil distributing ports 24 are opened in the elliptic external surface of the front portion of the inner stator 19 which is mounted in the rotor 5 .
- An external surface of a rear portion of the inner stator 19 is a cylindrical surface, on which a keyway is machined to cooperate with a keyway in a shaft hole of the right end cover 1 to prevent a relative rotation therebetween.
- a left washer 11 which is a circular member, is mounted on the bottom of the sectorial cylinders 26 of the rotor 5 , having sectorial holes 27 on its circumference for fitting sectorial cylinders 26 of the rotor 5 , and an oil leakage hole 29 at its center.
- a right washer 13 is also a circular member, having sectorial holes 27 on its circumference for fitting the sectorial cylinders of the rotor 5 , and an inner stator mounting hole 28 at its center to engage with a cylindrical surface of the inner stator 19 .
- the right washer 13 and an adjusting retaining ring 14 are mounted at the tail of the sectorial cylinders of the rotor 5 to support the rotor.
- the two washers may be provided or not provided depending on the actual machining accuracy of the sectorial cylinders. In case the machining accuracy of the sectorial cylinders of the rotor is high, both of the two washers may be omitted.
- the rotor 5 is mounted in a cavity of the outer stator 3 by means of a left bearing 9 and a right bearing 16 .
- the left end cover 6 and the right end cover 1 are mounted on two end faces of the outer stator 3 by fastening bolts 15 .
- the left end cover 6 and the right end cover 1 preferably have a circular periphery, while the outer stator 3 preferably has a slightly square cross section.
- the distance between adjacent edges of two adjacent oil distributing ports in outer stator 20 is larger than or equal to the minimum distance between two tangent lines formed by contacting two adjacent sets of sliders 22 with the internal surface of the outer stator 3 , so as to ensure that the adjacent oil distributing ports in outer stator 20 are separated from each other by a set of sliders 22 .
- the oil distributing ports in outer stator 20 are connected to a hydraulic power unit through oil passing holes in outer stator 21 and a pipeline.
- the distance between adjacent edges of two adjacent oil distributing ports in inner stator 24 is larger than or equal to the minimum distance between two tangent lines formed by contacting two adjacent sets of sliders 22 mounted in the sectorial cylinders 26 of the rotor 5 with the external surface of the front portion of the inner stator 19 , so as to ensure that the adjacent oil distributing ports in inner stator 24 are separated from each other by a set of sliders 22 .
- the oil distributing ports in inner stator 24 are connected to the hydraulic power unit through oil passing holes in inner stator 23 and a pipeline.
- a screw thread is machined at the tail of the inner stator 19 to axially fix the inner stator 19 by being engaged with a round nut 18 .
- a mounting hole 25 for a transmission shaft 7 is formed at a front end of the rotor 5 .
- the rotor 5 and the transmission shaft 7 are separate parts.
- the torque and the speed of the rotor 5 are transmitted via the transmission shaft 7 .
- a transmission shaft of an actuator or a prime mover may be directly coupled with the rotor mounting hole 25 by a key, thereby omitting the transmission shaft and simplifying the structure of the motor.
- a rear portion of the rotor 5 is machined with a plurality of uniformly distributed sectorial cylinders 26 for mounting the set of sliders 22 .
- the sectorial cylinders 26 are obtained by machining the cylindrical rear portion of the rotor, and the distance between two sectorial cylinders 26 is equal to the width of each set of sliders. In this example, there are eight sectorial cylinders 26 . To be noted, the width of the sectorial cylinders 26 depends on their eccentric distance and determines the flow rate and the rotary speed. During the implementation, the distance between two sectorial cylinders varies in the set of sliders of different type.
- An oil leakage hole 8 is machined at the center of the rotor 5 , and connected to a leakage oil return port 10 of the motor.
- FIG. 12 illustrates a cantilever-type shaft rotating double-stator multi-speed motor with curves of constant width, comprising a rotor 5 , an inner stator 19 , an outer stator 3 , sets of sliders 22 , a left end cover 6 and a right end cover 1 , wherein an output shaft and the rotor are provided in a form of a shaft-integrated rotor 31 , which is mounted in a shaft hole of the left end cover 6 by a centripetal thrust bearing 9 , so that the right washer and the right bearing can be omitted.
- the left end cover 6 , the outer stator 3 and the right end cover 1 are fastened by fastening bolts 30 .
- an inner motor is constructed by the inner stator 19 , the inside of a sectorial cylinders 26 of the rotor, the sets of sliders 22 and the end covers at both sides
- an outer motor is constructed by the outer stator 3 , the outside of the sectorial cylinders 26 of the rotor, the sets of sliders 22 and the end covers at both sides.
- a differential motor is formed when the torque corresponding to the inner and outer motors are in opposite directions.
- One differential motor is formed in case of single-action, and different combinations can be formed in case of double-action and multi-action to form multiple types of differential motors. Therefore, several different speeds can be implemented within one motor shell.
Abstract
Description
- The present invention relates to a variable capacity hydraulic machine, and particularly, to a shaft rotating double-stator multi-speed motor with curves of constant width.
- As an increasingly mature hydraulic component, the hydraulic motor is widely applied in different industries. In various motors, most major parts are in a sliding friction state, which not only affects their service lives but also decreases their working efficiencies. In addition, most motors cannot work unless being reset by a return spring, while a fatigue failure of the spring is caused during the reciprocating motion, thus the service life and the reliability of the motor are directly affected. Furthermore, the motors are mainly single input and single output motors, and several motors shall be connected in parallel to achieve multiple speeds. But it is difficult to accommodate several motors in one motor shell simultaneously, so it is hard to realize a large-scale speed change or torque conversion, and also hard to achieve high power, small size or light weight.
- The inventor disclosed a double-stator roller pump with curves of constant width (Chinese Patent No. 02144406.4) in 2002, in which a curve of a external surface curve of the inner stator and a curve of a internal surface curve of the outer stator are two similar curves which are smooth and closed. The difference between the curvature radiuses of the outer stator curve and the inner stator curve is a constant. The rotor is a circular ring, which has radial through-grooves for mounting sets of rollers, each set composed of an outer roller body, a link and an inner roller body. The pump has a novel design and works stably, and can serve as either a pump or a motor. However, oil distributing ports of such pump are always provided on a side plate, thus components, such as the sets of rollers, will be worn severely, thereby causing problems such as oil leakage and low efficiency.
- In order to overcome the above deficiency of the prior art, the present invention provides a shaft rotating double-stator multi-speed motor with curves of constant width, which works stably, achieves a high efficiency and can realize a multi-speed output in one motor.
- The present invention adopts the following technical solution to solve its technical problem:
- A shaft rotating double-stator multi-speed motor with curves of constant width, comprising a rotor, an inner stator mounted in the rotor, an outer stator, sets of sliders mounted on the rotor, a left end cover and a right end cover. An curve of a external surface of a front portion of the inner stator and a curve of an internal surface of the outer stator are two similar curves which are smooth and closed, wherein oil distributing ports in outer stator are opened in the outer stator in the number of 2×n, e.g., two oil distributing ports in outer stator are opened in a single-action motor, four oil distributing ports in outer stator are opened in a double-action motor, and 2×n oil distributing ports in outer stator are opened in a n-action motor (n is the number of actions, which defines as the inlet-outlet circles of a working liquid per rotation of the rotor, n=1 to 10); and oil distributing ports in inner stator are opened on the external surface of the front portion of the inner stator in the same number of the oil distributing ports in outer stator.
- Preferably, a positioning key is disposed between the inner stator and the right end cover to prevent a relative rotation therebetween; a left washer is mounted at the bottom of sectorial cylinders of the rotor, and a right washer is mounted at the tail of the sectorial cylinders of the rotor; the rotor is mounted in a cavity of the outer stator by means of a left bearing and a right bearing; the left end cover and the right end cover are mounted on two end faces of the outer stator by fastening bolts.
- Preferably, a distance between adjacent edges of two adjacent oil distributing ports in outer stator is larger than or equal to the minimum distance between two tangent lines formed by contacting two adjacent sets of sliders with the internal surface of the outer stator, and the oil distributing ports in outer stator are connected to a hydraulic power unit through oil passing holes in outer stator and a pipeline.
- Preferably, a distance between adjacent edges of two adjacent oil distributing ports in inner stator is larger than or equal to the minimum distance between two tangent lines formed by contacting two sets of sliders mounted in the sectorial cylinders of the rotor with the external surface of the front portion of the inner stator, and the oil distributing ports in inner stator are connected to a hydraulic power unit through communicated oil passing holes in inner stator and a pipeline.
- An external surface of a rear portion of the inner stator is a cylindrical surface, on which a keyway is machined, a screw thread is machined at the tail of the inner stator, and the inner stator is fixed on the right end cover by a round nut.
- A transmission shaft mounting hole is machined at a front end of the rotor, a plurality of uniformly distributed sectorial cylinders for mounting the sets of sliders are machined at a rear portion of the rotor and obtained by machining a circular ring, a distance between two adjacent sectorial cylinders is equal to a width of the set of sliders, and the number of the sectorial cylinders is 4×n (n is the number of actions, n=1 to 10).
- An oil leakage hole is machined a center of the rotor center and connected to a leakage oil return port of the rotor.
- The left washer is circular, with sectorial holes opened on the circumference for fitting the sectorial cylinders and a central hole opened at the circle center; and the right washer is also circular, with sectorial holes opened on the circumference for fitting the sectorial cylinders, and an inner stator mounting hole opened at the circle center for fitting the cylindrical surface of the inner stator.
- The set of sliders may have multiple structures, such as cylinder type, bicylinder type, bicylinder with link type, slider type, or blade type cut from concentric circles. The width of the set of sliders shall meet the width requirement of a groove formed by two adjacent sectorial cylinders of the rotor, and the height of the set of sliders is equal to a required height of the sectorial cylinders of the rotor. The number of the sets of sliders shall be larger than or equal to 4×n (n is the number of actions, n=1 to 10). In the bicylinder with the set of sliders of link type, the radius of the link end shall be larger than the diameter of the cylinder. The set of sliders of slider type shall be obtained by removing portions on both sides of cylinders adopting a distance between the inner and outer curves of the double-stator motor as their diameters.
- The present invention has the following beneficial effects: since the oil distributing ports are opened on the internal surface of the elliptical curve of the outer stator and the external surface of the elliptical curve of the front portion of the inner stator, the present invention decreases the wearing of the inner stator, the outer stator and the set of sliders, reduces the leakage, and makes the wearing gap be automatically compensated. In addition, the motor according to the present invention works stably and has a small volume, a light weight, a large specific power, a strong operability, a long service life and a high efficiency. According to the present invention, a plurality of hydraulic motors of different inputs are set in one shell, so as to output different speeds and torques when these motors have different inputs or outputs. The present invention can also serve as a multi-output pump.
-
FIG. 1 is a view showing a structure of a shaft rotating double-stator multi-speed motor with curves of constant width; -
FIG. 2 is a sectional view of the shaft rotating double-stator multi-speed motor with curves of constant width, which mainly illustrates fitting relationships among an outer stator, a rotor, an inner stator and sets of sliders; -
FIG. 3 is a view showing a structure of the rotor; -
FIG. 4 is a view showing the structure of the rotor in direction K; -
FIG. 5 is a right view of the rotor; -
FIG. 6 is view showing a structure of a left washer; -
FIG. 7 is view showing a structure of a right washer; -
FIG. 8 is view showing a structure of the inner stator; -
FIG. 9 is a sectional view of the inner stator taken in a line D-D inFIG. 8 ; -
FIG. 10 is a sectional view of the inner stator taken in a line B-B inFIG. 8 ; -
FIG. 11 is a sectional view of the inner stator taken in a line C-C inFIG. 8 ; -
FIG. 12 is a view showing a structure of a half shaft rotating double-stator multi-speed motor with curves of constant width according to another embodiment of the present invention; -
FIG. 13 is a sectional view corresponding toFIG. 12 taken in another direction. - 1. Right End Cover
- 2. Inner Roller
- 3. Outer Stator
- 4. Link
- 5. Rotor
- 6. Left End Cover
- 7. Transmission Shaft
- 8. Oil Leakage Hole
- 9. Left Bearing
- 10. Leakage Oil Return port
- 11. Left Washer
- 12. Outer Roller
- 13. Right Washer
- 14. Adjusting Retaining Ring
- 15. Fastening Bolt
- 16. Right Bearing
- 17. Positioning Key
- 18. Round Nut
- 19. Inner Stator
- 20. Oil Distributing Port in Outer Stator
- 21. Oil Passing Hole in Outer Stator
- 22. Set of Sliders
- 23. Oil Passing Hole in Inner Stator
- 24. Oil Distributing Port in Inner Stator
- 25. Transmission Shaft Mounting Hole
- 26. Sectorial Cylinder
- 27. Sectorial Hole
- 28. Inner Stator Mounting Hole
- 29. Oil Leakage Hole in Washer
- 30. Fastening Bolt
- 31. Shaft-Integrated Rotor
- As illustrated in
FIGS. 1 to 13 , the present invention provides a shaft rotating double-stator multi-speed motor with curves of constant width, comprising a rotor, an inner stator mounted in the rotor, an outer stator, sets of sliders mounted on the rotor, a left end cover and a right end cover. A curve of an external surface of a front portion of the inner stator and a curve of an internal surface of the outer stator are two similar curves which are smooth and closed. In the motor, oil distributing ports are opened in the outer stator in the number of 2×n, e.g., two in a single-action motor, four in a double-action motor, and 2×n in a n-action motor (n is the number of the actions, n=1 to 10). Oil distributing ports are opened in the external surface of the front portion of the inner stator in the same number of the oil distributing ports in the outer stator. Since theses oil distributing ports are opened in an internal surface of the outer stator curve and an external surface of the inner stator front portion curve, the present invention decreases the wearing of the inner stator, the outer stator and the set of sliders, reduces the leakage, and enables the wearing gap be automatically compensated. - The embodiments of the present invention are further described in details as follows in conjunction with the drawings and examples.
-
FIG. 1 is an overall view showing a structure of the disclosed shaft rotating double-stator multi-speed motor with curves of constant width according to example 1. The motor comprises arotor 5, aninner stator 19, anouter stator 3, sets ofsliders 22, aleft end cover 6 and aright end cover 1. In this example, a curve of an external surface of a front portion of theinner stator 19 and a curve of an internal surface curve of theouter stator 3 are two similar elliptic curves which are smooth and closed. Therotor 5 is mounted with sets of sliders, each set composed of aninner roller 2, alink 4 and anouter roller 12. Fouroil distributing ports 20 are opened in the elliptic internal surface of theouter stator 3. Fouroil distributing ports 24 are opened in the elliptic external surface of the front portion of theinner stator 19 which is mounted in therotor 5. - An external surface of a rear portion of the
inner stator 19 is a cylindrical surface, on which a keyway is machined to cooperate with a keyway in a shaft hole of theright end cover 1 to prevent a relative rotation therebetween. - A
left washer 11, which is a circular member, is mounted on the bottom of thesectorial cylinders 26 of therotor 5, havingsectorial holes 27 on its circumference for fittingsectorial cylinders 26 of therotor 5, and anoil leakage hole 29 at its center. - A
right washer 13 is also a circular member, havingsectorial holes 27 on its circumference for fitting the sectorial cylinders of therotor 5, and an innerstator mounting hole 28 at its center to engage with a cylindrical surface of theinner stator 19. Theright washer 13 and anadjusting retaining ring 14 are mounted at the tail of the sectorial cylinders of therotor 5 to support the rotor. - The two washers may be provided or not provided depending on the actual machining accuracy of the sectorial cylinders. In case the machining accuracy of the sectorial cylinders of the rotor is high, both of the two washers may be omitted.
- The
rotor 5 is mounted in a cavity of theouter stator 3 by means of aleft bearing 9 and aright bearing 16. Theleft end cover 6 and theright end cover 1 are mounted on two end faces of theouter stator 3 by fasteningbolts 15. In this example, theleft end cover 6 and theright end cover 1 preferably have a circular periphery, while theouter stator 3 preferably has a slightly square cross section. - The distance between adjacent edges of two adjacent oil distributing ports in
outer stator 20 is larger than or equal to the minimum distance between two tangent lines formed by contacting two adjacent sets ofsliders 22 with the internal surface of theouter stator 3, so as to ensure that the adjacent oil distributing ports inouter stator 20 are separated from each other by a set ofsliders 22. The oil distributing ports inouter stator 20 are connected to a hydraulic power unit through oil passing holes inouter stator 21 and a pipeline. - The distance between adjacent edges of two adjacent oil distributing ports in
inner stator 24 is larger than or equal to the minimum distance between two tangent lines formed by contacting two adjacent sets ofsliders 22 mounted in thesectorial cylinders 26 of therotor 5 with the external surface of the front portion of theinner stator 19, so as to ensure that the adjacent oil distributing ports ininner stator 24 are separated from each other by a set ofsliders 22. The oil distributing ports ininner stator 24 are connected to the hydraulic power unit through oil passing holes ininner stator 23 and a pipeline. - A screw thread is machined at the tail of the
inner stator 19 to axially fix theinner stator 19 by being engaged with around nut 18. - A mounting
hole 25 for atransmission shaft 7 is formed at a front end of therotor 5. Therotor 5 and thetransmission shaft 7 are separate parts. The torque and the speed of therotor 5 are transmitted via thetransmission shaft 7. During an operation, a transmission shaft of an actuator or a prime mover may be directly coupled with therotor mounting hole 25 by a key, thereby omitting the transmission shaft and simplifying the structure of the motor. A rear portion of therotor 5 is machined with a plurality of uniformly distributedsectorial cylinders 26 for mounting the set ofsliders 22. In details, thesectorial cylinders 26 are obtained by machining the cylindrical rear portion of the rotor, and the distance between twosectorial cylinders 26 is equal to the width of each set of sliders. In this example, there are eightsectorial cylinders 26. To be noted, the width of thesectorial cylinders 26 depends on their eccentric distance and determines the flow rate and the rotary speed. During the implementation, the distance between two sectorial cylinders varies in the set of sliders of different type. When the set ofsliders 22 belongs to a type of bicylinder with a link, the distance is only equal to the width of thelink 4, and the number of sectorial cylinders mounted with the sets ofsliders 22 is larger than or equal to 4×n (n is the number of the actions, n=1 to 10). Anoil leakage hole 8 is machined at the center of therotor 5, and connected to a leakageoil return port 10 of the motor. -
FIG. 12 illustrates a cantilever-type shaft rotating double-stator multi-speed motor with curves of constant width, comprising arotor 5, aninner stator 19, anouter stator 3, sets ofsliders 22, aleft end cover 6 and aright end cover 1, wherein an output shaft and the rotor are provided in a form of a shaft-integratedrotor 31, which is mounted in a shaft hole of theleft end cover 6 by acentripetal thrust bearing 9, so that the right washer and the right bearing can be omitted. Theleft end cover 6, theouter stator 3 and theright end cover 1 are fastened by fasteningbolts 30. The structures of other portions of the motor are the same as those in Example 1, and herein are not repeated. In addition, for the convenience of understanding the technical solution, the portions of the same function shall be represented with the same reference numeral, but a person skilled in the art may make an appropriate change or selection based on the prior art. - In the above mentioned motors, an inner motor is constructed by the
inner stator 19, the inside of asectorial cylinders 26 of the rotor, the sets ofsliders 22 and the end covers at both sides, while an outer motor is constructed by theouter stator 3, the outside of thesectorial cylinders 26 of the rotor, the sets ofsliders 22 and the end covers at both sides. As a result, a plenty of inner and outer motors can be formed within one shell, wherein one pair in case of single-action, two pairs in case of double-action, and multiple pairs in case of multi-action. The number of these motors is 2×n, wherein n is the number of the actions, n=1 to 10 but not limited thereto, and preferably n=2 to 5. In this way, a compromise between function request and volume limit of the motor can be well done. - Under the control of a control system, when one of these motors works while other motors are idle, there is a revolution. Different combinations of multiple motors lead to different revolutions, thereby forming a multi-speed motor. A differential motor is formed when the torque corresponding to the inner and outer motors are in opposite directions. One differential motor is formed in case of single-action, and different combinations can be formed in case of double-action and multi-action to form multiple types of differential motors. Therefore, several different speeds can be implemented within one motor shell.
- Although the present invention has been disclosed by the examples, it is not limited thereto. Any replacement of equivalent assembly made by a person skilled in the art without deviating from the conception or scope of the present invention, or any equivalent change or modification made according to the patent protection scope of the present invention, shall still be covered by this patent.
Claims (16)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201010137829 | 2010-03-29 | ||
CN2010101378298A CN101847917B (en) | 2010-03-29 | 2010-03-29 | Axially-rotating equal-width curve double-stator multi-speed motor |
PCT/CN2011/072216 WO2011120412A1 (en) | 2010-03-29 | 2011-03-28 | Shaft-driven double-stator multi-speed motor with equal-width curves |
Publications (2)
Publication Number | Publication Date |
---|---|
US20130039795A1 true US20130039795A1 (en) | 2013-02-14 |
US9347317B2 US9347317B2 (en) | 2016-05-24 |
Family
ID=42772413
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/381,086 Expired - Fee Related US9347317B2 (en) | 2010-03-29 | 2011-03-28 | Shaft rotating double-stator multi-speed motor with curves of constant width |
Country Status (5)
Country | Link |
---|---|
US (1) | US9347317B2 (en) |
EP (1) | EP2541741A4 (en) |
JP (1) | JP5805747B2 (en) |
CN (1) | CN101847917B (en) |
WO (1) | WO2011120412A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104393728A (en) * | 2014-12-23 | 2015-03-04 | 南车株洲电机有限公司 | Double-stator motor |
US9347317B2 (en) | 2010-03-29 | 2016-05-24 | Yanshan University | Shaft rotating double-stator multi-speed motor with curves of constant width |
CN113565757A (en) * | 2021-07-01 | 2021-10-29 | 燕山大学 | Multi-stage pressure discharge multi-output pump |
CN113833529A (en) * | 2020-06-24 | 2021-12-24 | 施耐宝公司 | Flow diverter for a flow path of a pneumatic tool |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102691614B (en) * | 2012-06-08 | 2014-08-13 | 燕山大学 | Double-stator swing hydraulic multi-speed motor |
CN102691655B (en) * | 2012-06-08 | 2015-02-25 | 燕山大学 | Shaft rotation double-stator cam rotor multi-output pump |
CN102720630B (en) * | 2012-06-08 | 2014-09-24 | 燕山大学 | Multispeed roller motor with double rotors in casing and rotating cam-link |
CN104033329B (en) * | 2013-03-06 | 2017-04-19 | 宁波高新协力机电液有限公司 | Radial-roller high-speed variable-displacement oil motor |
CN111828310B (en) * | 2020-07-21 | 2021-06-29 | 安徽理工大学 | Radial special-shaped plunger pump with blade characteristics and working method thereof |
CN112377363A (en) * | 2020-11-26 | 2021-02-19 | 黄淮学院 | Multi-stage variable displacement double-stator hydraulic motor |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3682143A (en) * | 1970-06-03 | 1972-08-08 | Leas Brothers Dev Corp | Cylindrical rotor internal combustion engine |
US3761151A (en) * | 1972-08-17 | 1973-09-25 | Nat Res Dev | Thrust bearing |
US5328337A (en) * | 1990-08-17 | 1994-07-12 | Kunta Norbert J | Guided vanes hydraulic power system |
US5855474A (en) * | 1996-01-05 | 1999-01-05 | Shouman; Ahmad R. | Multiple purpose two stage rotating vane device |
CN1403712A (en) * | 2002-09-25 | 2003-03-19 | 燕山大学 | Isowidth-curve double-stator roller pump |
US20080238254A1 (en) * | 2005-11-18 | 2008-10-02 | Tieying Zhou | Screw Thread Driving Polyhedral Ultrasonic Motor |
US7481730B2 (en) * | 2005-10-26 | 2009-01-27 | Solomon Technologies, Inc. | Multiple input, dual output electric differential motor transmission system |
US20090162225A1 (en) * | 2007-12-20 | 2009-06-25 | Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. | Pump for liquid cooling system |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL6813309A (en) * | 1968-09-18 | 1970-03-20 | ||
GB2016599B (en) * | 1978-03-03 | 1982-07-07 | Trw Inc | Rotary positive-displacement fluid machines |
JPS5941602A (en) * | 1982-09-01 | 1984-03-07 | Daikin Ind Ltd | Double multivane type rotary machine |
US4768936A (en) * | 1987-11-27 | 1988-09-06 | Carrier Corporation | Scroll compressor with oil pickup tube in oil sump |
JP3151551B2 (en) | 1995-09-13 | 2001-04-03 | 株式会社ベンカン | Pipe fittings |
FR2739505B1 (en) * | 1995-09-29 | 1997-12-19 | Technicatome | DISCOIDAL ASYNCHRONOUS ELECTRIC MOTOR |
US6684847B1 (en) * | 2002-07-10 | 2004-02-03 | Osama Al-Hawaj | Radial vane rotary device |
CN2760280Y (en) * | 2004-08-26 | 2006-02-22 | 伊顿流体动力(济宁)有限公司 | Double-stator laminated plate distribution cycloidal hydraulic motor |
JP4849328B2 (en) * | 2006-10-02 | 2012-01-11 | トヨタ車体株式会社 | Double stator type motor |
CN100487246C (en) * | 2007-10-25 | 2009-05-13 | 燕山大学 | Constant breath curved line double-stator axial direction shuttle block pump |
CN201197102Y (en) * | 2007-12-18 | 2009-02-18 | 苏卫星 | Power generation and electromotion multifunctional integrated equipment |
CN201282402Y (en) * | 2008-10-17 | 2009-07-29 | 沈阳工业大学 | Multi-disc type permanent magnet synchronous motor |
CN101847917B (en) | 2010-03-29 | 2011-12-21 | 燕山大学 | Axially-rotating equal-width curve double-stator multi-speed motor |
-
2010
- 2010-03-29 CN CN2010101378298A patent/CN101847917B/en not_active Expired - Fee Related
-
2011
- 2011-03-28 US US13/381,086 patent/US9347317B2/en not_active Expired - Fee Related
- 2011-03-28 WO PCT/CN2011/072216 patent/WO2011120412A1/en active Application Filing
- 2011-03-28 JP JP2013501609A patent/JP5805747B2/en not_active Expired - Fee Related
- 2011-03-28 EP EP11761986.6A patent/EP2541741A4/en not_active Withdrawn
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3682143A (en) * | 1970-06-03 | 1972-08-08 | Leas Brothers Dev Corp | Cylindrical rotor internal combustion engine |
US3761151A (en) * | 1972-08-17 | 1973-09-25 | Nat Res Dev | Thrust bearing |
US5328337A (en) * | 1990-08-17 | 1994-07-12 | Kunta Norbert J | Guided vanes hydraulic power system |
US5855474A (en) * | 1996-01-05 | 1999-01-05 | Shouman; Ahmad R. | Multiple purpose two stage rotating vane device |
CN1403712A (en) * | 2002-09-25 | 2003-03-19 | 燕山大学 | Isowidth-curve double-stator roller pump |
US7481730B2 (en) * | 2005-10-26 | 2009-01-27 | Solomon Technologies, Inc. | Multiple input, dual output electric differential motor transmission system |
US20080238254A1 (en) * | 2005-11-18 | 2008-10-02 | Tieying Zhou | Screw Thread Driving Polyhedral Ultrasonic Motor |
US20090162225A1 (en) * | 2007-12-20 | 2009-06-25 | Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. | Pump for liquid cooling system |
Non-Patent Citations (4)
Title |
---|
"Theoretic Research on Variable Displacement of equal-width Double-Stators Pump and Motor" by De-shong WEN, Shi-jun LU, Xiao-chen LIU, and Xing-zhou CAI, Journal of Harbin Institute of Technology, Vol. 40, No. 11, November 2008. * |
English Machine Translation of "Theoretic Research....", Nov. 2008 * |
English Machine Translation of CN 1042861 A, June 13, 1990 (DERWENT Abstract). * |
English Machine Translation of CN 1403712 A, October, 2008. * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9347317B2 (en) | 2010-03-29 | 2016-05-24 | Yanshan University | Shaft rotating double-stator multi-speed motor with curves of constant width |
CN104393728A (en) * | 2014-12-23 | 2015-03-04 | 南车株洲电机有限公司 | Double-stator motor |
CN113833529A (en) * | 2020-06-24 | 2021-12-24 | 施耐宝公司 | Flow diverter for a flow path of a pneumatic tool |
US11883942B2 (en) | 2020-06-24 | 2024-01-30 | Snap-On Incorporated | Flow path diverter for pneumatic tool |
CN113565757A (en) * | 2021-07-01 | 2021-10-29 | 燕山大学 | Multi-stage pressure discharge multi-output pump |
Also Published As
Publication number | Publication date |
---|---|
CN101847917B (en) | 2011-12-21 |
EP2541741A1 (en) | 2013-01-02 |
WO2011120412A1 (en) | 2011-10-06 |
US9347317B2 (en) | 2016-05-24 |
CN101847917A (en) | 2010-09-29 |
JP2013527362A (en) | 2013-06-27 |
EP2541741A4 (en) | 2016-12-14 |
JP5805747B2 (en) | 2015-11-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US9347317B2 (en) | Shaft rotating double-stator multi-speed motor with curves of constant width | |
US3557661A (en) | Fluid motor | |
JP2009529619A (en) | Axial plunger pump or motor | |
RU2732083C1 (en) | Adjustment unit for adjusting by azimuth and/or for adjusting angle of attack of wind-driven power plant, corresponding adjustment apparatus with such adjustment unit, wind-driven power plant, method of adjusting rotor blade, method of tracking wind direction, as well as use of adjustment unit | |
CN110285198A (en) | A kind of cycloid reducer | |
US3796525A (en) | Energy translation devices | |
CN102691655B (en) | Shaft rotation double-stator cam rotor multi-output pump | |
US9777729B2 (en) | Dual axis rotor | |
CN213116929U (en) | Precise hydraulic roller, hydraulic motor and low-speed high-torque hydraulic system | |
US4505185A (en) | Through-shaft energy converter transmission | |
US11624363B2 (en) | Dual drive gerotor pump | |
US9677574B1 (en) | Transmission assembly | |
EP3070330A1 (en) | Cylinder block assembly for hydraulic unit | |
CN113153852A (en) | Direction and flow combined type high-frequency response proportional rotary valve | |
CN110345121A (en) | Double-blade type rotary actuator | |
US9435378B1 (en) | Roller bearing outer race for hydraulic unit | |
EP3048302B1 (en) | Slipper retainer for hydraulic unit | |
US2417816A (en) | Fluid pump or motor | |
CN216290426U (en) | Wear-resistant energy-saving hydraulic oil pump motor set | |
CN216242135U (en) | Detachable cylindrical gear | |
EP3070370A1 (en) | Port plate assembly for hydraulic unit | |
CN211737217U (en) | Novel driving device for piston type pneumatic motor crankshaft block and gas distribution valve core | |
CN212376786U (en) | Axial flow distribution cycloid hydraulic motor | |
CN102720630B (en) | Multispeed roller motor with double rotors in casing and rotating cam-link | |
US9528552B2 (en) | Roller bearing outer race for hydraulic unit |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: YANSHAN UNIVERSITY, CHINA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:WEN, DESHENG;REEL/FRAME:027774/0082 Effective date: 20120219 |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
FEPP | Fee payment procedure |
Free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY |
|
LAPS | Lapse for failure to pay maintenance fees |
Free format text: PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP.); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY |
|
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |